Hello,
In the quick look view (the one that pops up) if you click on "add to cart" and then either "continue shopping" or "show cart", the page loads inside the popup window instead of returning to the original browser's window. I've tested this with Chrome, Firefox and IE 9.
I know that someone else has reported this in this forum (I can't remember who) but your answer to him was that this issue was due to some third part checkout components (or something like that) that he had installed. I myself have no such components or any other cart extensions but this "problem" exists.
My website is
www.jewelietta.com but it's still under development yet and I haven't finished the English version of it (It's bilingual). However if you want to test it append the /en at the end of my url to go to the yet unfinished english section.
Thanks!